Are these microwave devices pls reply yes or no:- Microwave Devices Backward Diode. It is one of the microwave semiconductor devices which are used as an oscillator and mixer. ... Gunn Diode. It is the microwave semiconductor diode which is used as an oscillator. ... Impatt Diode. ... Schottky Diode. ... Tunnel Diode. ... Varacter Diode. ... Transistors. ... Integrated Circuits (I.C)